betelgeuse,rr lyrae,cepheid variable,cepheid variable star,variable star,astronomy,red giant,animation,science,space,stars,supergiant,semiregular variable,rv tauri
betelgeuse,rr lyrae,cepheid variable,cepheid variable star,variable star,astronomy,red giant,animation,science,space,stars,supergiant,semiregular variable,rv tauri